The Ribs Flashcards
which ribs are atypical and what does this mean?
they only have one costa-vertebral articulation though a uni-facet. Other ribs have two attachments, one on the vertebral body, and one on the TP.
what are the muscles of inspiration?
external intercostalis, serratus anterior/ posterior superior, scalenes, levator costarium, SCM, pectoralis, Q.L. by fixing the 12th rib (provides a stable border for the descending diaphragm)
what are the muscles of expiration?
recoil of the diaphragm, internal intercostalis, transversus thoracics, serratus posterior inferior, lat. dorsalis, Iliocostalis lumborum, longissimus thoracics, subcostalis, Q.L., plus abodominal muscles in forced exhalation.
what is the direction of the ribs (11, 12) that do calliper movements?
inspiration ; posterior and lateral exhalation ; anterior and medial
pump handle action. What is this?
it is the moment of the anterior extremity of the ribs (more upper)
what is an important tissue texture abnormality to palpate for with rib dysfunctions?
hypertonicity of the iliocostalis attachment at the rib angle and the intercostal muscles.
bucket handle. What is this?
it is the movement of the lateral extremity of the ribs (more lower)
What is the main determinant of bucket handle or pump handle motion of the ribs?
the axis of motion between the costo-vertebral and the costotransverse articulations.
How do you look for a cervical rib?
Px supine, push down upper fibres of trapezius towards the couch and side bend px head to ipsilateral side.
what are the signs and symptoms of a cervical rib?
pain and paraesthesia in T1 dermatome
weakness in hand muscles
possible finger curling
impingement of sub-clavian artery
where is T1 dermatome?
what muscles attach to rib one?
scalenes, SCM, subclavius
what is the ‘key rib’?
The rib that stops first during inhalation/ exhalation
